Water savings

I have one 3.5 toilet that may get used 6 times a day.
If I change it out to a 1.6 toilet, how much savings can I realize? In dollars.
Here is a sample of a water bill similar to water usage in my home. 2 people.
I'm wondering if it is cost wise to change the toilet.
thanks,
david

If I presume the "local charges" and sewer charges stay proportional to water, that toilet now saves $57.09 per year -- 348% times as much as I had originally calculated. If those other charges were not proportional to the water portion, that changes things of course.

I am familiar with Cleveland Water and yes they bill quarterly. They bill for water usage to figure what is owed to them and they also bill for the NEORSD (Northeast Ohio Regional Sewer District) and bill for them. Other local charges on the bill depending on the community or suburb served may be for trash collection or something else that water consumption does not affect

SO water consumption affects:

1. the Cleveland Division of Water bill
2. the NEORSD sewer charge

$55.45 is what the NEORSD charges per MCF of water consumption to treat sewage.
$29.48 is what the Division of Water charges for a thousand cubic feet of water after the first 0.6 MCF
7480 is the number of gallons in a MCF

Disregarding any fixed charges for the water, a gallon of water cost $29.48 / 7480 = $0.0039 (which is 0.39 cents)
Disregarding the base charge for sewer, the cost to treat a gallon water is $55.45 / 7480 = $0.0074 (which is 0.74 cents)

So the total cost for a gallon of water is $0.0039 + $0.0074 = $0.0113 (which is 1.3 cents)

If you save 4161 gallons a year by saving 11.4 gallons a day by saving 1.9 gallons per every 6 flushes,

Sewer rate is $58.15 per mcf per quarter. Fixed fee of $21.00 per quarter for the meter.
Based on the example... 2mcf times $58.15 = $116.30 for sewer plus $21.00 = 137.30.
Our suburb does not get charged the $51.31 local charges shown on the bill. So back that out.
Where am I at now, with savings, for the expense of a new toilet?

I type too slow. Seems hammerlane has it figured out. Thanks.

So it seems that if I upgrade to a Toto Drake for 300 or so dollars if will take me about 6 years to break even?

Believe it or not I kind of already had this figured. My grandmother(Bless her heart) would not flush the toilet after each sitting for #1. So I figured it out for her to see how much see is actually saving from not flushing. It turned out at that time to be just about one cent.

In LA, where water is a scarce commodity, I pay about 0.75 cent per gallon (including sewer charge).
In CLE, where water is abundant, people pay 1.3 cent per gallon? - makes no sense at all.

But as far as your savings switching to TOTO: I think it's worth it. In LA changing to 1.6 tanks is the law.

The real winner is the water supplier. When every customer switches to 1.6 toilets, they end up delivering less water, except they don't pass the saving (of maintaining their pipes, upgrading or changing the, and other costs) to their customers.

In other words, they over charge (or rip off) their best customers. Now you know how they can afford to offer sky high salaries to their employees.